Rev.Adv.Mater.Sci. (RAMS)
No 2, Vol. 28, 2011, pages 162-165

PREPARATION OF Ni POWDERS FABRICATED BY VARIOUS REDUCTIVE GASES

Ki Don Kim, Chang-Sup Oh, Sang-Cheol Kil, Jei-Pil Wang Yong-Ha Kim

Abstract

Ni powders were prepared in various gases from commercial NiO ores at different reaction conditions. Nickel oxide (NiO) pellet mixed with carbon powders was reduced in N2 gases at first reductive stage. In the temperature range from 800 to 1000 úC, the reduction rate of NiO increased with increasing temperature, reaction time, and carbon content in the pellet. At second stage NiO was consecutively reduced by hydrogen (H2) and the rate of reduction was also found to be increased with increasing temperature from 400 to 1100 úC, reaction time, hydrogen content. It was finally found that NiO was found to be almost completely reduced by hydrogen with 1.0 m3/hr at 1000 úC for 1 hour.

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